Heat exchange – Intermediate fluent heat exchange material receiving and... – Liquid fluent heat exchange material
Patent
1976-01-28
1978-03-07
Myhre, Charles J.
Heat exchange
Intermediate fluent heat exchange material receiving and...
Liquid fluent heat exchange material
34 27, 134107, 202170, 228180R, 228249, F28D 1500
Patent
active
040774678
ABSTRACT:
An apparatus for soldering an article which is placed within a first confined region in hot saturated vapors of a primary high temperature liquid. The vapors condense on the article to heat the article for such purpose. A second body of hot saturated vapors of a secondary liquid having a lower boiling point and density than the primary liquid provides a secondary vapor blanket in a second confined region of the apparatus which causes the primary vapors to condense and return to a primary liquid reservoir so that their escape from the apparatus is prevented. The temperature of the secondary liquid is controlled independently of the primary liquid.
Preferably, the apparatus is such that the article is sequentially inserted into the first and second confined regions and sequentially removed therein, the article remaining in each of the regions temporarily during which times the regions are prevented from communication with each other and with the ambient atmosphere so that an effective vapor-lock operation occurs. The article may be pre-heated to a higher temperature than that of the secondary vapors before insertion therein to prevent undesirable flux removal before soldering takes place. The primary and secondary liquids and flux remaining on the article after soldering can be removed by spraying the article with distilled secondary liquid as it passes through the secondary vapors on the removal of the article from the apparatus.
REFERENCES:
patent: 3866307 (1975-02-01), Pfahl
patent: 3904102 (1975-09-01), Chu
Myhre Charles J.
O'Connell Robert F.
O'Connor Daniel J.
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